Posts Tagged ‘ coincidence ’

the birthday problem [X’idated]

February 1, 2012
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the birthday problem [X’idated]

The birthday problem (i.e. looking at the distribution of the birthdates in a group of n persons, assuming a uniform distribution of the calendar dates of those birthdates) is always a source of puzzlement ! For instance, here is a recent post on Cross Validated: I have 360 friends on facebook, and, as

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another lottery coincidence

August 29, 2011
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another lottery coincidence

Once again, meaningless figures are published about a man who won the French lottery (Le Loto) for the second time. The reported probability of the event is indeed one chance out of 363 (US) trillions (i.e., billions in the metric system. or 1012)… This number is simply the square of which is the number of

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Coincidence in lotteries

October 19, 2010
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Coincidence in lotteries

Last weekend, my friend and coauthor Jean-Michel Marin was interviewed (as Jean-Claude Marin, sic!) by a national radio about the probability of the replication of a draw on the Israeli Lottery. Twice the same series of numbers appeared within a month. This lotery operates on a principle of 6/37 + 1/8: 6 numbers are drawn

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